TY - BOOK AU - Campbell, F.E. And Others AU - Campbell, F.E. And Others TI - Sound-film Projection : Dealing With Installition, Operation & Maintenansce Of Leading Types Of Sound - Projection Equipment And Public Adreaa Systems By. E. Molloy U1 - C30N915 PY - 1946/// CY - London PB - George Newries Ltd. KW - C30N915 ER -